Soil Lamp - Extremely fresh lamp we have here. Free and eco-friendly energy 24/7. Runs on mud with the help of the metabolism of biological life that produces enough electricity to keep a LED lamp burning. Mud is enclosed with various cells that contain copper and zinc which conduct the electricity. So more cells mean more electricity generated. Killer technique and definitely a springboard for many other opportunities. The only thing needed is just a splash of water every now and then. Sweet. Click here for more info.
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